\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{DID analysis for state law change}
\begin{tabular}{l*{4}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
            &\multicolumn{1}{c}{wtakeup}&\multicolumn{1}{c}{wtakeup}&\multicolumn{1}{c}{wtakeup}&\multicolumn{1}{c}{wtakeup}\\
\hline
1.treat2    &      -0.019         &      -0.029         &       0.111         &      -0.013         \\
            &     (0.046)         &     (0.082)         &     (0.066)         &     (0.046)         \\
[1em]
1.loss25k   &      -0.375\sym{***}&      -0.366\sym{***}&      -0.345\sym{***}&      -0.339\sym{***}\\
            &     (0.033)         &     (0.031)         &     (0.016)         &     (0.008)         \\
[1em]
1.treat2#1.loss25k&       0.100\sym{**} &       0.094\sym{**} &       0.085\sym{***}&       0.084\sym{***}\\
            &     (0.029)         &     (0.035)         &     (0.015)         &     (0.012)         \\
[1em]
\_cons      &       0.902\sym{***}&       0.898\sym{***}&       0.862\sym{***}&       0.876\sym{***}\\
            &     (0.025)         &     (0.013)         &     (0.016)         &     (0.001)         \\
\hline
\(N\)       &         581         &         581         &         575         &         575         \\
adj. \(R^{2}\)&       0.203         &       0.233         &       0.238         &       0.251         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<.10\), \sym{**} \(p<.05\), \sym{***} \(p<.01\)}\\
\end{tabular}
\end{table}
